Most of yinz here probably already know this but me and my buddy just got a couple Garrett ace 350's and being very new to this hobby have discovered that being within 30-35 ft of each other with both machines on sends them into overdrive making all sorts of noises like angry birds. This happened before but we didn't catch on right away and I thought they were malfunctioning. All is good now. I wonder if this happens with all detectors or like detectors with the same freq's or just the same make and models with the same freq